Bug 1479539 [wpt PR 12237] - Fix RTCPeerConnection-transceivers.https…

….html bug., a=testonly

Automatic update from web-platform-testsFix RTCPeerConnection-transceivers.https.html bug.

This PR accidentally made the "addTrack(0 streams)" test call addTrack()
with a stream, which broke the tests:
web-platform-tests/wpt#12141

Test restored and all "addTrack/addTransceiver(X streams)" are made to
consistently use "new MediaStream()" the same way.

Bug: 869036
Change-Id: Ieaf0c73a1996aeb2e87e18f2f9065fa1e6fee1e7
Reviewed-on: https://chromium-review.googlesource.com/1155125
Reviewed-by: Harald Alvestrand <htachromium.org>
Commit-Queue: Henrik Boström <hboschromium.org>
Cr-Commit-Position: refs/heads/master{#579341}

--

wpt-commits: 6468c69f9f9e5925f6af370ad127a72c3adc14ed
wpt-pr: 12237

UltraBlame original commit: e5221e193074c83a7ee7028a0ca894d8268490f2

testing/web-platform/meta/MANIFEST.json

@@ -4307009,7 +4307009,7 @@ html
 :
 [
 "
-49f683911e61bf7e0c0466e6d6a91f2f70ab30e6
+c89737c99fcebe76b1156499cb7269e7b0a67af1
 "
 "
 testharness

testing/web-platform/tests/webrtc/RTCPeerConnection-transceivers.https.html

@@ -2929,7 +2929,6 @@
 const
 [
 track
-stream
 ]
 =
 await
@@ -3024,7 +3023,6 @@
 const
 [
 track
-stream
 ]
 =
 await
@@ -3033,6 +3031,14 @@
 t
 )
 ;
+const
+stream
+=
+new
+MediaStream
+(
+)
+;
 pc1
 .
 addTransceiver
@@ -3150,7 +3156,6 @@
 const
 [
 track
-stream
 ]
 =
 await
@@ -3324,7 +3329,6 @@
 const
 [
 track
-stream
 ]
 =
 await
@@ -3338,7 +3342,6 @@
 addTrack
 (
 track
-stream
 )
 ;
 const
@@ -3414,7 +3417,6 @@
 const
 [
 track
-stream
 ]
 =
 await
@@ -3423,6 +3425,14 @@
 t
 )
 ;
+const
+stream
+=
+new
+MediaStream
+(
+)
+;
 pc1
 .
 addTrack
@@ -3534,7 +3544,6 @@
 const
 [
 track
-stream
 ]
 =
 await